基于电磁超声斜入射SV波的厚壁管道裂纹检测系统  

Crack-Inspection Device Based on Electromagnetic Acoustic Angled Shear Vertical Wave for Thick-Wall Pipelines

作　　者：苏日亮[1] 康磊[1] 冯剑钊[1] 王淑娟[1] 翟国富[1] 

机构地区：[1]哈尔滨工业大学军用电器研究所,哈尔滨150001

出　　处：《无损检测》2010年第8期641-644,共4页Nondestructive Testing

摘　　要：为对厚壁管道缺陷进行有效检测,将电磁超声检测技术与数字信号处理器(DSP)技术相结合,开发了基于电磁超声的厚壁管道裂纹检测系统。通过DSP控制检测系统在厚壁管道中激发电磁超声斜入射SV波,经过DSP将裂纹回波信号处理后显示于上位机。试验结果表明,系统能够在壁厚为35mm的管道中检测出深度>2mm的裂纹缺陷。With combination of electromagnetic acoustic technique and DSP application technology, a crackinspection device based on electromagnetic acoustic technique was developed for effectively detecing the crack defects of thick-walled pipelines. Electromagnetic acoustic shear vertical wave could be excited under the control of DSP. The echo signal was extracted by DSP and detection result was finally displayed on a computer. Experiment showed that the device could realize a real time detection of crack defects that were deeper than 2 mm for a 35 mm thick pipeline.

关 键 词：厚壁管道 裂纹检测 电磁超声 斜入射SV波 数字信号处理器 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置] TG115.28[自动化与计算机技术—控制科学与工程]